Simple Underground Biomes adds several underground biomes for you to explore.
Underground biomes - Various stone types to make your caving and exploration more exciting
Extra Ore Gen - Some underground biomes have some extra ore
Building blocks- Spruce up your builds
Crafting Tweaks - All stone types can be used to craft anything stone or cobblestone related
Does this mod affect performance?
There's always going to be some performance impact with a mod like this. World generation will be slightly slower. I haven't seen any noticeable slowdowns, but that will vary from PC to PC.
X part of this mod isn't realistic! Pls fix!
This mod isn't intended to be realistic
Can you add X stone?
Possibly! Let me know either on a github issue or in the comments here, no guarantees though.
Another Mod does the same/similar things that this mod does!
I'm aware some other mods do stuff like this. This mod is supposed to be a light weight alternative that maybe does a few things differently. Just pick your favorite mod and use that.
Mods that work well with this mod:
Worley's Caves - Better Cave Generation
Better Compass - Better Compasses
Quark - Lots of general improvements
Subterranean Waters - Underground rivers, oceans and lakes